Include py.typed (#160)

Author: cdce8p

python_typing_update/py.typed

@@ -20,6 +20,10 @@ classifier =
 [options]
 packages = find:
 python_requires = >=3.8,<3.10
+include_package_data = True
+
+[options.package_data]
+* = py.typed, *.pyi
 
 [options.packages.find]
 include =